subtraction

[Mark]

I have a spreadsheet for bills,, when i check off a bill paid in row C with
an (x) I want it to automaticly subtract the amount in row D from the total
line of D 30.
Is it possible.?

 

[T. Valko]

Does D30 already contain a formula? Is this for a check register type of
thing?

 

[JoeU2004]

I have a spreadsheet for bills,, when i check off a bill paid in row C
with
an (x) I want it to automaticly subtract the amount in row D from the
total
line of D 30. Is it possible.?

You're a little light on details. But perhaps the following paradigm will
help.

In D30:

=SUM(D129) - SUMIF(C1:C29,"x",D129)